Nonlinear nanofocusing in tapered plasmonic waveguides.
نویسندگان
چکیده
We suggest using tapered waveguides for compensating losses of surface plasmon-polaritons in order to enhance nonlinear effects at the nanoscale. We study nonlinear plasmon self-focusing in tapered metal-dielectric-metal slot waveguides and demonstrate that, by an appropriate choice of the taper angle, we can effectively suppress the mode attenuation achieving stable propagation of a spatial plasmon soliton. For larger tapering angles we observe plasmon-beam nanofocusing in both spatial dimensions.
منابع مشابه
Optimal tapers for compensating losses in plasmonic waveguides
1 Introduction The study of the field enhancement and subwavelength focusing of light in optical waveguides is of great interest for many applications including sensing, lasing, and imaging. The light confinement in conventional optical waveguides is limited by diffraction and by that dielectric waveguides do not allow the effective field fo-cusing to dimensions less than a micron. In contrast,...
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ورودعنوان ژورنال:
- Physical review letters
دوره 105 11 شماره
صفحات -
تاریخ انتشار 2010